This is my message from the Biola Digital Ministry Conference 2012.
First I discuss why usability matters (giving both the practical case and the biblical case, which is very interesting). Then I go into the nuts and bolts of how to make your website usable, focusing especially on how to create good information architecture (the key to usability).
And here are my slides for the message (which you can use to follow along on the message, or just click through all on their own):